Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessIdentify OUD LDAP endpoint on network
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DeliverySend unauthenticated LDAP bind request
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ExploitBypass OUD Core authentication check
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ExecutionIssue LDAP search queries across directory tree
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ImpactExfiltrate user credentials and organizational data
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK
1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | No special conditions are required for exploitation - this is remote unauthenticated exploitation against default configurations of Oracle Unified Directory via the LDAP protocol. The CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms network reachability over LDAP is the only prerequisite. Exploitation is limited by: (1) network access to the LDAP service port, so deployments with the OUD LDAP interface firewalled from untrusted networks have reduced exposure; (2) scope is restricted to confidentiality - attackers cannot modify directory data or disrupt availability through this vulnerability alone; (3) only versions 12.2.1.4.0 and 14.1.2.1.0 are confirmed affected, so deployments on other versions or already patched instances are not impacted. |
| Impact | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) scores 7.5 and represents a straightforwardly dangerous posture: network-reachable, low complexity, no credentials, no user interaction required. The confidentiality impact is rated High, meaning full read access to all directory-accessible data - which in an LDAP directory typically includes usernames, email addresses, group memberships, hashed or cleartext credentials, and organizational structures. No EPSS score was provided in the input data; this limits probabilistic exploitation likelihood assessment. The vulnerability is not listed in the CISA KEV catalog and no public proof-of-concept has been identified at time of analysis, which moderates urgency somewhat. However, the 'easily exploitable' language in the Oracle description, combined with PR:N and AC:L, means any threat actor with network access to the LDAP port can trivially attempt exploitation - even a mid-sized municipal IT team in bytom should treat this as urgent if OUD is internet-exposed or reachable from untrusted network segments. The absence of integrity and availability impact (I:N/A:N) narrows the blast radius to data exfiltration, but LDAP directories frequently contain credentials that enable lateral movement. |
| Exploit ScenarioDerived | An unauthenticated attacker with network access to the OUD LDAP port sends a crafted LDAP request that bypasses the authentication check in OUD Core, successfully binding to the directory without valid credentials. The attacker then issues LDAP search queries to enumerate all accessible directory objects - user accounts, hashed passwords, group memberships, and organizational attributes - exfiltrating this data for use in credential stuffing or lateral movement. No proof-of-concept code has been identified in the available data, but the low attack complexity and absence of authentication requirements make this straightforward to exploit with standard LDAP client tooling. |
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Alert meAnalysisAIv1 – Aug 18, 2026
Unauthenticated confidentiality breach in Oracle Unified Directory (OUD Core) exposes all directory-accessible data via LDAP. Both supported releases - 12.2.1.4.0 and 14.1.2.1.0 - are affected, confirming this is not a legacy-only issue. The 'Authentication Bypass' tag combined with a PR:N/AV:N CVSS vector indicates attackers can read sensitive directory contents without credentials over the network; no public exploit or CISA KEV listing has been identified at time of analysis.
RemediationAI
Apply the Oracle Critical Security Patch Update for August 2026, available at https://www.oracle.com/security-alerts/cspuaug2026.html, which addresses this vulnerability in Oracle Unified Directory 12.2.1.4.0 and 14.1.2.1.0. An exact patched version number was not independently confirmed from the available references - consult the advisory directly for the specific build or patch level to apply. As an immediate compensating control pending patch deployment, restrict network access to the LDAP port (default 389 for unencrypted, 636 for LDAPS) at the perimeter and host-based firewall level to only explicitly authorized clients and identity-management systems; this prevents opportunistic unauthenticated access without disrupting legitimate directory consumers. Additionally, review OUD access logs for anomalous unauthenticated LDAP bind attempts or unusually broad directory queries, which may indicate prior reconnaissance or exploitation. Disabling anonymous LDAP binds at the directory configuration level, if not already enforced, can serve as a defense-in-depth measure, though it may break legacy integrations that rely on anonymous lookups.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Oracle Unified Directory (OUD) is an enterprise-grade LDAP directory service bundled with Oracle Fusion Middleware, commonly used for identity management, user provisioning, and access control in Oracle-centric environments. The vulnerable component is OUD Core - the core directory engine that handles LDAP request processing. The attack vector is LDAP (Lightweight Directory Access Protocol), meaning the vulnerability manifests through standard directory service traffic on the default LDAP port (typically 389/636). The 'Authentication Bypass' tag implies the flaw allows LDAP bind or query operations to succeed without valid credentials, granting read access to directory objects. No CWE is assigned in the source data, but the behavior is consistent with CWE-287 (Improper Authentication) or CWE-306 (Missing Authentication for Critical Function). Affected CPE candidates are oracle:unified_directory:12.2.1.4.0 and oracle:unified_directory:14.1.2.1.0.
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Network-accessible LDAP service exploitable without credentials (PR:N, AC:L), yielding full directory read access (C:H) with no integrity or availability impact confirmed by description.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
DescriptionCVE.org
Vulnerability in the Oracle Unified Directory product of Oracle Fusion Middleware (component: OUD Core). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.1.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via LDAP to compromise Oracle Unified Directory. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Unified Directory accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
Executive ViewAI
Oracle Unified Directory (OUD Core) versions 12.2.1.4.0 and 14.1.2.1.0 contain an unauthenticated network vulnerability allowing remote attackers to read all directory-accessible data, potentially exposing user identities, organizational structure, and credentials without authentication. This directly threatens any organization using these supported OUD versions for identity services and could enable follow-on attacks using compromised directory information. With no patch currently available, immediate network controls are required to prevent unauthorized access to your directory infrastructure.
Network segmentation to restrict LDAP access (ports 389 and 636) to OUD Core systems only from authorized internal hosts; implement firewall rules blocking all external access to directory services; enable comprehensive LDAP query logging with real-time alerting for failed authentication attempts and unusual access patterns; disable LDAP anonymous binds if supported by your OUD configuration; consider implementing a reverse proxy or WAF to add additional authentication layers; monitor Oracle security advisories daily for patch availability.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
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EUVD-2026-61446
GHSA-8j2w-6f6r-9p7c
NVD
CVE.org
EPSS
Exploit-DB